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136 Layers and Masks<br />
• To link layers, select multiple layers and choose Link Layers from the Layers<br />
menu (or right-click in the Layers tab).<br />
• To rearrange layers, select the layer(s) in the Layers tab and drag up or down.<br />
A red line “drop target” appears between layers as you drag. Drop the layer(s)<br />
on a target to relocate in the stack.<br />
• To merge layers together into one, right click and choose Merge Down<br />
(merges into layer below), Merge Visible (merges only visible layers), Merge<br />
Selected Layers (merges currently selected layers), or Merge All (to flatten all<br />
layers into one).<br />
Using layer groups<br />
For greater management and<br />
efficiency it is possible to place selected<br />
layers into a pre-defined group, created<br />
with the New Layer Group button in the<br />
Layers tab.<br />
In the example opposite, the highlighted<br />
“Beach Only” group contains two<br />
transparent standard layers called “Beach”<br />
and “Surfer Girl”.<br />
Alternatively, you can select multiple layers and add them to a new unnamed<br />
group by selecting either New Layer Group from Selected Layers or Group<br />
Layers on the Layers menu. There are many reasons why you might want to use<br />
groups in addition to layers. Here are a few...<br />
• To create a self-contained group of layers which are all related, e.g. all the Text<br />
Layers used in your photo.<br />
• To collect layers together which make up a specific photo feature, e.g. the<br />
beach components of a seaside shot.<br />
• To make a mask or blend apply to only specific layers, i.e. those that contained<br />
within a group.<br />
• To apply changes to a group that you would otherwise have to apply to each<br />
layer in turn—thus improving efficiency.